Blockchain-Assisted Spectrum Trading Between Elastic Virtual Optical Networks
Blockchain-Assisted Spectrum Trading Between Elastic Virtual Optical Networks
复制标题
区块链辅助弹性虚拟光网络之间的频谱交易
DOI：
10.1109/mnet.011.2000138
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发表时间：
2020-11-01
期刊：
影响因子：
9.3
通讯作者：
Mukherjee, Biswanath
中科院分区：
文献类型：
--
作者：
Ding, Shifeng;Shen, Gangxiang;Mukherjee, Biswanath
在通信网络中，网络虚拟化通常可以提供比其他方式更好的容量利用率和服务质量（QoS）。在这种操作下，一旦分配了虚拟光网络（VON）的容量，其将在一定时间段（例如，服务合同期）内是静态的。然而，在现实中，VON的实际业务需求总是波动的，这将导致分配的容量和实际承载的业务需求之间的不匹配。这种不匹配将进一步导致所提供的网络服务的降级和所分配的网络容量的低效率。为了克服这个问题，我们提出了一个新的计划，称为频谱交易（ST），在弹性光网络（EON）的上下文中的VON之间的交易频谱资源。其核心思想是允许不同的PON根据其在不同时刻的实际容量需求来交易其频谱资源。具有未使用频谱的VON可以将其未使用的频谱交换给当时缺少频谱资源的其他VON。作为交换，它会因为对ST社区的贡献而得到一些奖励，如果需要的话，它可以在以后使用这些奖励来获得额外的容量。通过区块链辅助的分类账以分布式方式确保VON之间交易记录的可信度，该分类账在新交易发生时更新。还开发了一个软件定义的控制平面，以便在区块链辅助分类账的支持下实现频谱交易。ST计划的性能进行评估，并与没有这样的交易的情况下进行比较。结果表明，所提出的ST计划是有效的，在提高每个VON的QoS和显着提高整体网络容量利用率。
in communication networks, network virtualization can usually provide better capacity utilization and quality of service (QoS) than what can be achieved otherwise. Under this operation, once the capacity of a virtual optical network (VON) is allocated, it will be static for a certain period, for example, a service contract period. However, in reality, the actual traffic demand of a VON always fluctuates, which would lead to a mismatch between the capacity assigned and the actual traffic demand carried. This mismatch would further cause degradation of provisioned network services and inefficiency in assigned network capacity. To overcome this issue, we propose a new scheme, called spectrum trading (ST), to trade spectrum resources between VONs in the context of an elastic optical network (EON). The key idea is to allow different VONs to trade their spectrum resources according to their actual capacity requirement at different time instants. A VON with unused spectra can trade away its unused spectra to other VONs that are short of spectrum resources at that time. in exchange, it is rewarded with some credit for its contribution to the ST community, which it can then use later to obtain extra capacity, if needed. The trust-worthiness of the trading records between the VONs is ensured in a distributed fashion through a blockchain- assisted ledger that is updated whenever a new trade occurs. A software-defined control plane is also developed to enable spectrum trading with the support of the blockchain-assisted ledger. The performance of the ST scheme is evaluated and compared with the scenario without such trading. Results show that the proposed ST scheme is efficient in improving the QoS of each VON and significantly improves overall network capacity utilization.